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Posterior tibial tendon

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https://www.readbyqxmd.com/read/29330345/a-computational-simulation-study-to-determine-the-biomechanical-influence-of-posterior-condylar-offset-and-tibial-slope-in-cruciate-retaining-total-knee-arthroplasty
#1
K-T Kang, Y-G Koh, J Son, O-R Kwon, J-S Lee, S K Kwon
OBJECTIVES: Posterior condylar offset (PCO) and posterior tibial slope (PTS) are critical factors in total knee arthroplasty (TKA). A computational simulation was performed to evaluate the biomechanical effect of PCO and PTS on cruciate retaining TKA. METHODS: We generated a subject-specific computational model followed by the development of ± 1 mm, ± 2 mm and ± 3 mm PCO models in the posterior direction, and -3°, 0°, 3° and 6° PTS models with each of the PCO models...
January 2018: Bone & Joint Research
https://www.readbyqxmd.com/read/29312850/anterolateral-rotatory-instability-in-vivo-correlates-tunnel-position-after-anterior-cruciate-ligament-reconstruction-using-bone-patellar-tendon-bone-graft
#2
Yasutaka Tashiro, Ken Okazaki, Koji Murakami, Hirokazu Matsubara, Kanji Osaki, Yukihide Iwamoto, Yasuharu Nakashima
AIM: To quantitatively assess rotatory and anterior-posterior instability in vivo after anterior cruciate ligament (ACL) reconstruction using bone-patellar tendon-bone (BTB) autografts, and to clarify the influence of tunnel positions on the knee stability. METHODS: Single-bundle ACL reconstruction with BTB autograft was performed on 50 patients with a mean age of 28 years using the trans-tibial (TT) (n = 20) and trans-portal (TP) (n = 30) techniques. Femoral and tibial tunnel positions were identified from the high-resolution 3D-CT bone models two weeks after surgery...
December 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/29291205/topiramate-induced-peripheral-neuropathy-a-case-report-and-review-of-literature
#3
Sherifa Ahmed Hamed
Drug-induced peripheral neuropathy had been rarely reported as an adverse effect of some antiepileptic drugs (AEDs) at high cumulative doses or even within the therapeutic drug doses or levels. We describe clinical and diagnostic features of a patient with peripheral neuropathy as an adverse effect of chronic topiramate (TPM) therapy. A 37-year-old woman was presented for the control of active epilepsy (2010). She was resistant to some AEDs as mono- or combined therapies (carbamazepine, sodium valproate, levetiracetam, oxcarbazepine and lamotrigine)...
December 16, 2017: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/29244525/20-year-outcomes-of-anterior-cruciate-ligament-reconstruction-with-hamstring-tendon-autograft-the-catastrophic-effect-of-age-and-posterior-tibial-slope
#4
Lucy J Salmon, Emma Heath, Hawar Akrawi, Justin P Roe, James Linklater, Leo A Pinczewski
BACKGROUND: No well-controlled studies have compared the long-term outcome of anterior cruciate ligament (ACL) reconstruction with hamstring tendon autograft between adolescents and adults. Increased posterior tibial slopes (PTSs) have been reported in the ACL-injured versus controls, but the effect of PTS on the outcome after reconstruction is relatively unexplored. PURPOSE: To compare the prospective longitudinal outcome of "isolated" ACL ruptures treated with anatomic endoscopic ACL reconstruction using hamstring tendon autograft over 20 years in adolescent and adult cohorts and to examine factors for repeat ACL injury...
December 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29194449/reported-selection-criteria-for-adult-acquired-flatfoot-deformity-and-posterior-tibial-tendon-dysfunction-are-they-one-and-the-same-a-systematic-review
#5
REVIEW
Megan H Ross, Michelle D Smith, Bill Vicenzino
BACKGROUND: Posterior tibial tendon dysfunction (PTTD) and adult acquired flatfoot deformity (AAFD) are used interchangeably, although both suggest quite different pathological processes. OBJECTIVE: To investigate key differences in selection criteria used for inclusion into research studies. METHODS: An electronic database search was performed from inception to June 2016. All primary research articles with clear inclusion/diagnostic criteria for PTTD or AAFD were included in the review...
2017: PloS One
https://www.readbyqxmd.com/read/29191469/role-of-anterolateral-reconstruction-in-patients-undergoing-anterior-cruciate-ligament-reconstruction
#6
REVIEW
C Lutz
There is renewed interest in anterolateral reconstruction (ALR) for patients undergoing anterior cruciate ligament (ACL) reconstruction. This is the result of isolated ACL reconstruction and double-bundle reconstruction providing inadequate control over the pivot shift, and recent anatomical and biomechanical studies on the anterolateral ligament (ALL) and its role in the knee's rotational stability.From a technical point of view, ALR can be performed either as a continuity of the intra-articular ACL reconstruction or an independent procedure...
November 27, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29144991/finite-element-simulation-on-posterior-tibial-tendinopathy-load-transfer-alteration-and-implications-to-the-onset-of-pes-planus
#7
Duo Wai-Chi Wong, Yan Wang, Aaron Kam-Lun Leung, Ming Yang, Ming Zhang
BACKGROUND: Posterior tibial tendinopathy is a challenging foot condition resulting in pes planus, which is difficult to diagnose in the early stage. Prior to the deformity, abnormal internal load transfer and soft tissue attenuation are anticipated. The objective of this study was to investigate the internal load transfer and strain of the ligaments with posterior tibial tendinopathy, and the implications to pes planus and other deformities. METHODS: A three-dimensional finite element model of the foot and ankle was reconstructed from magnetic resonance images of a 28-year-old normal female...
November 3, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29103778/reduced-bearing-excursion-after-mobile-bearing-unicompartmental-knee-arthroplasty-is-associated-with-poor-functional-outcomes
#8
Naman Wahal, Sahil Gaba, Rajesh Malhotra, Vijay Kumar, Elise C Pegg, Hemant Pandit
BACKGROUND: A small proportion of patients with mobile unicompartmental knee arthroplasty (UKA) report poor functional outcomes in spite of optimal component alignment on postoperative radiographs. The purpose of this study is to assess whether there is a correlation between functional outcome and knee kinematics. METHODS: From a cohort of consecutive cases of 150 Oxford medial UKA, patients with fair/poor functional outcome at 1-year postsurgery (Oxford Knee Score [OKS] < 34, n = 15) were identified and matched for age, gender, preoperative clinical scores, and follow-up period with a cohort of patients with good/excellent outcome (OKS ≥ 34, n = 15)...
October 6, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29079740/anatomical-study-of-the-neurovascular-in-flexor-hallucis-longus-tendon-transfers
#9
Haijiao Mao, Wenwei Dong, Zengyuan Shi, Weigang Yin, Dachuan Xu, Keith L Wapner
The transfer of the flexor hallucis longus tendon or flexor digitorum longus tendon is frequently used for the treatment of posterior tibial tendon insufficiency or chronic Achilles tendinopathy. According to several anatomical studies, harvesting the flexor hallucis longus (FHL) tendon may cause nerve injury. Sixty-eight embalmed feet were dissected and anatomically classified to define the relationship between Henry's knot and the plantar nerves. Two different configurations were identified. In Pattern 1, which was observed in 64 specimens (94...
October 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29078822/presentation-diagnosis-and-nonsurgical-treatment-options-of-the-anterior-tibial-tendon-posterior-tibial-tendon-peroneals-and-achilles
#10
REVIEW
David Pedowitz, David Beck
Disorders of the anterior tibial tendon (ATT) are rare, and relatively few series have been described in the literature. Ruptures of the ATT are more common than tendinopathies of the ATT. For those patients with a tendinopathy, initial treatment may include activity and shoe-wear modifications.
December 2017: Foot and Ankle Clinics
https://www.readbyqxmd.com/read/29075841/effects-of-tibial-baseplate-shape-on-rotational-alignment-in-total-knee-arthroplasty-three-dimensional-surgical-simulation-using-osteoarthritis-knees
#11
Yuan Ma, Hideki Mizu-Uchi, Ken Okazaki, Tetsuro Ushio, Koji Murakami, Satoshi Hamai, Yukio Akasaki, Yasuharu Nakashima
INTRODUCTION: Placement of tibial component is expected to fulfill both maximum surface coverage and recommended anterior-posterior (AP) alignment in total knee arthroplasty (TKA). The purpose of this study is to evaluate the effect of the tibial baseplate shape on AP axis. MATERIALS AND METHODS: Virtual surgery of TKA was performed with three-dimensional bone models reconstructed from 77 osteoarthritis varus knees. Two differently designed tibial baseplates, symmetrically and anatomically, were set to the cut surface under posterior slopes of 0°, 3°, and 7°...
October 26, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29071376/-corrective-procedures-and-indications-for-cavovarus-foot-deformities-in-children-and-adolescents
#12
REVIEW
J Hamel
Cavovarus deformities in children and adolescents require sound considerations concerning the timing for corrective surgery. Progression can be recognized best by repeated pedographic examination with evaluation of the typical features of cavovarus deformity. Surgical correction consists of a combination of soft tissue release, bony realignment, and restoration of muscle balance. In most cases plantar or medioplantar soft tissue release should be considered, whereas calf muscle lengthening is rarely indicated...
October 25, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28979585/posterior-tibial-tendon-dysfunction-an-overview
#13
Samuel Ka-Kin Ling, Tun Hing Lui
BACKGROUND: Adult acquired flatfoot deformity is a commonly seen condition with a large clinical spectrum. It ranges from asymptomatic subjects to severely disabled arthritic patients. Posterior tibialis tendon dysfunction is a common cause of adult acquired flatfoot deformity. METHODS: This article systematically reviews the published literature from books and journals that were either originally written or later translated into the English language regarding the subject of posterior tibialis tendon dysfunction...
2017: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/28970981/adjustable-button-devices-for-all-arthroscopic-posterior-cruciate-ligament-reconstruction-using-the%C3%A2-hamstrings-tendons-and-the-forgotten-transseptal-approach
#14
Paul Brossard, Achilleas Boutsiadis, Jean-Claude Panisset, Frédéric Mauris, Johannes Barth
Posterior cruciate ligament (PCL) ruptures account for nearly 20% of all ligamentous knee injuries. These may be either isolated or in the setting of a more complex knee trauma. Isolated tears with moderate posterior laxity (grades I or II) are commonly treated conservatively; nevertheless, symptomatic grade III injuries frequently require surgical intervention. PCL reconstruction remains a challenging surgery for multiple reasons like the neurovascular structures' proximity, the difficult passage of the graft with the "killer turn" angle, or the risk of poor graft fixation...
August 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28952799/biomechanical-consequences-of-subtalar-joint-arthroereisis-in-treating-posterior-tibial-tendon-dysfunction-a-theoretical-analysis-using-finite-element-analysis
#15
Duo Wai-Chi Wong, Yan Wang, Tony Lin-Wei Chen, Aaron Kam-Lun Leung, Ming Zhang
Subtalar joint arthroereisis (SJA) has been introduced to control the hyperpronation in cases of flatfoot. The objective of this study is to evaluate the biomechanical consequence of SJA to restore the internal stress and load transfer to the intact state from the attenuated biomechanical condition induced by posterior tibial tendon dysfunction (PTTD). A three-dimensional finite element model of the foot and ankle complex was constructed based on clinical images of a healthy female (age 28 years, height 165 cm, body mass 54 kg)...
September 27, 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28916912/morphological-changes-in-tibial-tunnels-after-anatomic-anterior-cruciate-ligament-reconstruction-with-hamstring-tendon-graft
#16
Tomoki Ohori, Tatsuo Mae, Konsei Shino, Yuta Tachibana, Kazuomi Sugamoto, Hideki Yoshikawa, Ken Nakata
BACKGROUND: Three-dimensional (3D) reconstructed computed tomography (CT) is crucial for the reliable and accurate evaluation of tunnel enlargement after anterior cruciate ligament (ACL) reconstruction. The purposes of this study were to evaluate the tibial tunnel enlargement at the tunnel aperture and inside the tunnel and to clarify the morphological change at the tunnel footprint 1 year after the anatomic triple-bundle (ATB) ACL reconstruction using 3D CT models. METHODS: Eighteen patients with unilateral ACL rupture were evaluated...
September 15, 2017: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/28840670/-adult-experience-with-the-tibialis-posterior-transposition-to-the-center-of-the-foot-in-neuromuscular-disease
#17
P Parra-Téllez, H Jiménez-López, E López-Gavito, J Vázquez-Escamilla
The transfer of the posterior tibial tendon to the center of the dorsum of the foot is a method used to achieve dorsiflexion in flaccid paralysis of the anterolateral leg muscles or muscular imbalance of clubfoot. OBJECTIVE: To describe functional results back to the surgical procedure for transposition of posterior tibial the center of the foot. MATERIAL AND METHODS: The study design was observational, descriptive, transversal, ambispective with a description of the world of work patients with impaired dorsiflexora foot muscles and impaired gait in the period January 2008 to December 2014...
March 2017: Acta Ortopédica Mexicana
https://www.readbyqxmd.com/read/28779813/severe-stage-2-fuse-or-reconstruct
#18
REVIEW
Scott B Shawen, Theodora C Dworak
Stage II posterior tibial tendon dysfunction encompasses a wide range of patients with varying degrees of deformity and function. The spectrum of patients can be difficult to treat with a single surgical approach, as evidenced by the wide range of techniques present in the literature. Severity of the deformity, patient functional level, age, and comorbidities must be considered to determine the best course of treatment. This article examines when fusion versus reconstruction is the appropriate treatment of patients with severe stage II posterior tibial tendon dysfunction and its subclassifications...
September 2017: Foot and Ankle Clinics
https://www.readbyqxmd.com/read/28779804/what-to-do-with-the-spring-ligament
#19
REVIEW
Brian Steginsky, Anand Vora
The spring ligament complex is an important static restraint of the medial longitudinal arch of the foot and its failure has been associated with progressive flatfoot deformity. Reconstruction of the spring ligament complex is most appropriate in stage II posterior tibial tendon dysfunction, before severe peritalar subluxation and rigid deformity develops. Although an understanding of the spring ligament complex and its contribution to medial arch stability has grown, there is no unanimously accepted surgical technique that has consistently demonstrated satisfactory outcomes...
September 2017: Foot and Ankle Clinics
https://www.readbyqxmd.com/read/28755303/-degeneration-of-the-posterior-tibial-tendon-established-and-new-concepts
#20
REVIEW
Markus Walther
BACKGROUND: The most common cause of degeneration of the posterior tibial tendon is a congenital valgus deformity of the calcaneus. Other associated pathologies are forefoot supination, forefoot abduction and shortening of the gastrocnemius muscle. DIAGNOSTICS: Loaded x‑rays of the foot in three planes as well as the hindfoot alignment view enable evaluation of the axis of the foot under static loading conditions. The posterior tibial tendon can be imaged with ultrasound and magnetic resonance imaging (MRI)...
July 28, 2017: Der Unfallchirurg
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